Malicious PDF — malware analysis report

Static analysis result for SHA-256 5984a4780312e211…

MALICIOUS

PDF

39.6 KB Created: 2020-08-01 14:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f3ef398cd3d3c34310c5323ca4f85e5 SHA-1: 8491ae5814f989f15d8890a95ba3ba54a1302a41 SHA-256: 5984a4780312e211b378cdbb526ba3d48b15e86508bb4f50df23a46d7facf32c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains multiple embedded URLs. One URL, 'https://ttraff.ru/pify?keyword=factorio+bus+balancer', is identified as a known malicious redirector. The file also exhibits characteristics of a PDF link farm, with numerous links to other PDF documents hosted on various domains, including several on cdn.shopify.com. The document body is heavily obfuscated and contains some of the extracted URLs, suggesting an attempt to disguise the malicious nature of the content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=factorio+bus+balancer In PDF document text
    • http://files.fromtheeasel.net/uploads/1/3/1/6/131636914/digusomipa-danalur-wofibededut.pdfIn PDF document text
    • http://files.lukehannan.com.au/uploads/1/3/0/7/130775257/8655585.pdfIn PDF document text
    • http://files.westvillecoc.org/uploads/1/3/2/6/132681796/kogep.pdfIn PDF document text
    • http://files.melfoster.co/uploads/1/3/1/0/131070434/d7fd112ca57586.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/vegemirigonotin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/bisanetivape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/rijigofemavowizakeriv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/nuzoxowuboko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1349/6222/files/mozevubegaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/44845392827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5837/8392/files/vexusogatuvedidil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/75425320124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/zisipevabatujeruzomexevuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nipexaledova.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 4888 bytes
SHA-256: a372e2348167145412af43d302f0780b47d36447888f780b9e80be52deb9cf08
font_01_sfnt_off00006fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD0 9916 bytes
SHA-256: 5c49f27d1f9102ca187ac0842db662a76eb827726c650740fccc7073fa16451b

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